Question

Define class size of an observation.​

Answer 1

Step-by-step explanation:

Class size: Difference between the true upper limit and true lower limit of a class interval is called the class size. ... Class mark: Mid-value of each class interval is called its class mark.

Answer 2

For most data, 6 to 15 classes are enough. Class intervals (lengths) should be equal. Intervals such as 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50, etc are desirable. The starting point for each class should be divisible by the interval, For example, in the class 15 - 20, the starting point, 15, is divisible by the interval, 5